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条形码/二维码之开源利器ZXing图文介绍

2014-11-06 11:06 323 查看

全文目录：

基本介绍
二维码（比如：QRCode）的编码和解码演示
条形码（比如：EAN-13）的编码和解码演示

【一】、
基本介绍：

1-1. ZXing是一个开源Java类库用于解析多种格式的条形码和二维码.

官网：http://code.google.com/p/zxing/

截止目前为止最新版本为1.7，提供以下编码格式的支持：

UPC-A and UPC-E
EAN-8 and EAN-13
Code 39
Code 93
Code 128
QR Code
ITF
Codabar
RSS-14 (all variants)
Data Matrix
PDF 417 ('alpha' quality)
Aztec ('alpha' quality)
同时官网提供了 Android、cpp、C#、iPhone、j2me、j2se、jruby、objc、rim、symbian等多种应用的类库，具体详情可以参考下载的源码包中。

1-2. 本文和之前的那篇文章一样，主要是在PC上实现条形码（EAN-13）和二维码（QRCode）的编码和解码的示例，以供大家参考，用到了源码中core和javase下面的相关源代码，附件提供自己编译之后的lib包：

zxing.jar
zxing-j2se.jar
有关各种手机系统的应用，有兴趣的朋友可以下载官方源码包，包下有具体详细的应用介绍。

【二】、
二维码（QRCode）的编码和解码演示：

2-1. 编码示例：

Java代码

package michael.zxing;



import java.io.File;

import java.util.Hashtable;



import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;



/**

* @blog http://sjsky.iteye.com

* @author Michael

*/

public class ZxingEncoderHandler {



    /**

     * 编码

     * @param contents

     * @param width

     * @param height

     * @param imgPath

     */

    public void encode(String contents, int width, int height, String imgPath) {

        Hashtable<Object, Object> hints = new Hashtable<Object, Object>();

        // 指定纠错等级

        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);

        // 指定编码格式

        hints.put(EncodeHintType.CHARACTER_SET, "GBK");

        try {

            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,

                    BarcodeFormat.QR_CODE, width, height, hints);



            MatrixToImageWriter

                    .writeToFile(bitMatrix, "png", new File(imgPath));



        } catch (Exception e) {

            e.printStackTrace();

        }

    }



    /**

     * @param args

     */

    public static void main(String[] args) {

        String imgPath = "d:/test/twocode/michael_zxing.png";

        String contents = "Hello Michael(大大),welcome to Zxing!"

                + "\nMichael’s blog [ http://sjsky.iteye.com ]"

                + "\nEMail [ sjsky007@gmail.com ]" + "\nTwitter [ @suncto ]";

        int width = 300, height = 300;

        ZxingEncoderHandler handler = new ZxingEncoderHandler();

        handler.encode(contents, width, height, imgPath);



        System.out.println("Michael ,you have finished zxing encode.");

    }

}

package michael.zxing;

import java.io.File;
import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
* @blog http://sjsky.iteye.com * @author Michael
*/
public class ZxingEncoderHandler {

/**
* 编码
* @param contents
* @param width
* @param height
* @param imgPath
*/
public void encode(String contents, int width, int height, String imgPath) {
Hashtable<Object, Object> hints = new Hashtable<Object, Object>();
// 指定纠错等级
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
// 指定编码格式
hints.put(EncodeHintType.CHARACTER_SET, "GBK");
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.QR_CODE, width, height, hints);

MatrixToImageWriter
.writeToFile(bitMatrix, "png", new File(imgPath));

} catch (Exception e) {
e.printStackTrace();
}
}

/**
* @param args
*/
public static void main(String[] args) {
String imgPath = "d:/test/twocode/michael_zxing.png";
String contents = "Hello Michael(大大),welcome to Zxing!"
+ "\nMichael’s blog [ http://sjsky.iteye.com ]"
+ "\nEMail [ sjsky007@gmail.com ]" + "\nTwitter [ @suncto ]";
int width = 300, height = 300;
ZxingEncoderHandler handler = new ZxingEncoderHandler();
handler.encode(contents, width, height, imgPath);

System.out.println("Michael ,you have finished zxing encode.");
}
}

运行后生成的二维码图片如下：

和前篇介绍一样，用手机的二维码扫描软件（本人用的：android 快拍二维码）来测试下，识别成功的截图如下：

2-2. 解码示例：

Java代码

</pre><img class="spinner" style="DISPLAY: none" src="http://sjsky.iteye.com/images/spinner.gif" alt="" /></div></div><ol class="dp-j"><li><span class="keyword">package</span> michael.zxing;   </li><li>  </li><li><span class="keyword">import</span> java.awt.image.BufferedImage;   </li><li><span class="keyword">import</span> java.io.File;   </li><li><span class="keyword">import</span> java.util.Hashtable;   </li><li>  </li><li><span class="keyword">import</span> javax.imageio.ImageIO;   </li><li>  </li><li><span class="keyword">import</span> com.google.zxing.BinaryBitmap;   </li><li><span class="keyword">import</span> com.google.zxing.DecodeHintType;   </li><li><span class="keyword">import</span> com.google.zxing.LuminanceSource;   </li><li><span class="keyword">import</span> com.google.zxing.MultiFormatReader;   </li><li><span class="keyword">import</span> com.google.zxing.Result;   </li><li><span class="keyword">import</span> com.google.zxing.client.j2se.BufferedImageLuminanceSource;   </li><li><span class="keyword">import</span> com.google.zxing.common.HybridBinarizer;   </li><li>  </li><li><span class="comment">/** </span> </li><li><span class="comment"> * @blog http://sjsky.iteye.com </span> </li><li><span class="comment"> * @author Michael </span> </li><li><span class="comment"> */</span>  </li><li><span class="keyword">public</span> <span class="keyword">class</span> ZxingDecoderHandler {   </li><li>  </li><li>    <span class="comment">/** </span> </li><li><span class="comment">     * @param imgPath </span> </li><li><span class="comment">     * @return String </span> </li><li><span class="comment">     */</span>  </li><li>    <span class="keyword">public</span> String decode(String imgPath) {   </li><li>        BufferedImage image = <span class="keyword">null</span>;   </li><li>        Result result = <span class="keyword">null</span>;   </li><li>        <span class="keyword">try</span> {   </li><li>            image = ImageIO.read(<span class="keyword">new</span> File(imgPath));   </li><li>            <span class="keyword">if</span> (image == <span class="keyword">null</span>) {   </li><li>                System.out.println(<span class="string">"the decode image may be not exit."</span>);   </li><li>            }   </li><li>            LuminanceSource source = <span class="keyword">new</span> BufferedImageLuminanceSource(image);   </li><li>            BinaryBitmap bitmap = <span class="keyword">new</span> BinaryBitmap(<span class="keyword">new</span> HybridBinarizer(source));   </li><li>  </li><li>            Hashtable<Object, Object> hints = <span class="keyword">new</span> Hashtable<Object, Object>();   </li><li>            hints.put(DecodeHintType.CHARACTER_SET, <span class="string">"GBK"</span>);   </li><li>  </li><li>            result = <span class="keyword">new</span> MultiFormatReader().decode(bitmap, hints);   </li><li>            <span class="keyword">return</span> result.getText();   </li><li>        } <span class="keyword">catch</span> (Exception e) {   </li><li>            e.printStackTrace();   </li><li>        }   </li><li>        <span class="keyword">return</span> <span class="keyword">null</span>;   </li><li>    }   </li><li>  </li><li>    <span class="comment">/** </span> </li><li><span class="comment">     * @param args </span> </li><li><span class="comment">     */</span>  </li><li>    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> main(String[] args) {   </li><li>        String imgPath = <span class="string">"d:/test/twocode/michael_zxing.png"</span>;   </li><li>        ZxingDecoderHandler handler = <span class="keyword">new</span> ZxingDecoderHandler();   </li><li>        String decodeContent = handler.decode(imgPath);   </li><li>        System.out.println(<span class="string">"解码内容如下："</span>);   </li><li>        System.out.println(decodeContent);   </li><li>        System.out.println(<span class="string">"Michael ,you have finished zxing decode."</span>);   </li><li>  </li><li>    }   </li><li>}  </li></ol></div><pre title="条形码/二维码之开源利器ZXing图文介绍" class="java" style="DISPLAY: none" name="code" codeable_id="" codeable_type="BlogComment" source_url="http://sjsky.iteye.com/blog/1142177#" pre_index="1">package michael.zxing;

import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
* @blog http://sjsky.iteye.com * @author Michael
*/
public class ZxingDecoderHandler {

/**
* @param imgPath
* @return String
*/
public String decode(String imgPath) {
BufferedImage image = null;
Result result = null;
try {
image = ImageIO.read(new File(imgPath));
if (image == null) {
System.out.println("the decode image may be not exit.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

Hashtable<Object, Object> hints = new Hashtable<Object, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "GBK");

result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* @param args
*/
public static void main(String[] args) {
String imgPath = "d:/test/twocode/michael_zxing.png";
ZxingDecoderHandler handler = new ZxingDecoderHandler();
String decodeContent = handler.decode(imgPath);
System.out.println("解码内容如下：");
System.out.println(decodeContent);
System.out.println("Michael ,you have finished zxing decode.");

}
}

运行结果如下：

解码内容如下：
Hello Michael(大大),welcome to Zxing!

Michael’s blog [ http://sjsky.iteye.com ]

EMail [ sjsky007@gmail.com ]

Twitter [ @suncto ]

Michael ,you have finished zxing decode.

从测试结果可见：解码出的内容和之前编码的内容是一致

【三】、
条形码（EAN-13）的编码和解码演示：

3-1. 编码示例：

Java代码

package michael.zxing;

import java.io.File;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;

/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class ZxingEAN13EncoderHandler {

    /**
     * 编码
     * @param contents
     * @param width
     * @param height
     * @param imgPath
     */
    public void encode(String contents, int width, int height, String imgPath) {
        int codeWidth = 3 + // start guard
                (7 * 6) + // left bars
                5 + // middle guard
                (7 * 6) + // right bars
                3; // end guard
        codeWidth = Math.max(codeWidth, width);
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
                    BarcodeFormat.EAN_13, codeWidth, height, null);

            MatrixToImageWriter
                    .writeToFile(bitMatrix, "png", new File(imgPath));

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        String imgPath = "d:/test/twocode/zxing_EAN13.png";
        // 益达无糖口香糖的条形码
        String contents = "6923450657713";

        int width = 105, height = 50;
        ZxingEAN13EncoderHandler handler = new ZxingEAN13EncoderHandler();
        handler.encode(contents, width, height, imgPath);

        System.out.println("Michael ,you have finished zxing EAN13 encode.");
    }
}

package michael.zxing;

import java.io.File;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;

/**
* @blog http://sjsky.iteye.com * @author Michael
*/
public class ZxingEAN13EncoderHandler {

/**
* 编码
* @param contents
* @param width
* @param height
* @param imgPath
*/
public void encode(String contents, int width, int height, String imgPath) {
int codeWidth = 3 + // start guard
(7 * 6) + // left bars
5 + // middle guard
(7 * 6) + // right bars
3; // end guard
codeWidth = Math.max(codeWidth, width);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(contents,
BarcodeFormat.EAN_13, codeWidth, height, null);

MatrixToImageWriter
.writeToFile(bitMatrix, "png", new File(imgPath));

} catch (Exception e) {
e.printStackTrace();
}
}

/**
* @param args
*/
public static void main(String[] args) {
String imgPath = "d:/test/twocode/zxing_EAN13.png";
// 益达无糖口香糖的条形码
String contents = "6923450657713";

int width = 105, height = 50;
ZxingEAN13EncoderHandler handler = new ZxingEAN13EncoderHandler();
handler.encode(contents, width, height, imgPath);

System.out.println("Michael ,you have finished zxing EAN13 encode.");
}
}

6 923450 657713 对应的是益达无糖口香糖：

运行后生成的条形码图片如下：

用手机的扫描软件，识别成功的截图如下：

3-2. 解码示例：

Java代码

package michael.zxing;

import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
public class ZxingEAN13DecoderHandler {

    /**
     * @param imgPath
     * @return String
     */
    public String decode(String imgPath) {
        BufferedImage image = null;
        Result result = null;
        try {
            image = ImageIO.read(new File(imgPath));
            if (image == null) {
                System.out.println("the decode image may be not exit.");
            }
            LuminanceSource source = new BufferedImageLuminanceSource(image);
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

            result = new MultiFormatReader().decode(bitmap, null);
            return result.getText();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        String imgPath = "d:/test/twocode/zxing_EAN13.png";
        ZxingEAN13DecoderHandler handler = new ZxingEAN13DecoderHandler();
        String decodeContent = handler.decode(imgPath);
        System.out.println("解码内容如下：");
        System.out.println(decodeContent);
        System.out.println("Michael ,you have finished zxing EAN-13 decode.");

    }
}

package michael.zxing;

import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

/**
* @blog http://sjsky.iteye.com * @author Michael
*/
public class ZxingEAN13DecoderHandler {

/**
* @param imgPath
* @return String
*/
public String decode(String imgPath) {
BufferedImage image = null;
Result result = null;
try {
image = ImageIO.read(new File(imgPath));
if (image == null) {
System.out.println("the decode image may be not exit.");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

result = new MultiFormatReader().decode(bitmap, null);
return result.getText();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* @param args
*/
public static void main(String[] args) {
String imgPath = "d:/test/twocode/zxing_EAN13.png";
ZxingEAN13DecoderHandler handler = new ZxingEAN13DecoderHandler();
String decodeContent = handler.decode(imgPath);
System.out.println("解码内容如下：");
System.out.println(decodeContent);
System.out.println("Michael ,you have finished zxing EAN-13 decode.");

}
}

运行结果如下：

写道
解码内容如下：
6923450657713

Michael ,you have finished zxing decode.

从测试结果可见：解码出的内容和之前编码的内容是一致。

转载请注明来自：Michael's blog @ http://sjsky.iteye.com

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